Playing his first career final, Siddharth defeated Christophersen 21-15 21-11 in a 33-minute match to claim the men's singles title yesterday.
The 19-year-old from Raipur survived a scare in the opening match against Denmark's Patrick Bjerregaard, beating the Danish player 21-23, 23-21, 21-15.
He then defeated world No 104 Sergey Sirant 21-15, 21-9 in the second round, before disposing Sweden's Felix Burestedt and Indonesia's Hermansah in straight games.
Siddharth, who has never played outside Asia, will next play in the Iceland International at Reykjavik to be held from January 25 to 28.
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